Design and Fabrication of a Quad-Band Bandpass Filter Using Multi-Layered Sir Structure

Yang, Ru‐Yuan; Hung, Cheng-Yuan; Lin, and Jia-Sheng

doi:10.2528/pier11010606

Cited by 14 publications

(9 citation statements)

References 15 publications

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“…It is composed of two bi-section λ/2 SIRs and two full λ SIRs. To proceed smoothly, the two outer resonators are annotated as SIRs A and D while the two inner resonators are annotated as SIRs B and C. The resonant frequencies of utilized SIRs associated with two operation modes can be engineered in accordance with [16,17]. The filter is symmetric with respect to the central dashed line.…”

Section: Design Concept Of Balanced Bpfmentioning

confidence: 99%

Stopband-Extended Balanced Filters Using Both Λ/4 and Λ/2 Sirs With Common-Mode Suppression and Improved Passband Selectivity

Lin¹,

Yeh²

2012

PIER

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Abstract-Benefitting from the simultaneous utilization of quarterwave (λ/4) and half-wave (λ/2) microstrip resonators, a via-free balanced bandpass filter (BPF) with direct-coupled scheme is presented in this study. In the beginning, a single-ended filter with transmission zeros (TZs) is newly proposed and the mechanism of creating two TZs around the passband without necessitating cross couplings is adopted. The TZs can be made structure-inherent based on the coexisted out-of-phase couplings among a coupled-resonator pair. On the foundation of the presented single-ended filter, a balanced filter featuring extended differential-mode (DM) stopband, good commonmode (CM) suppression, and improved passband selectivity has been designed and implemented. The DM stopband extension is achieved by misaligning the higher-order harmonic frequencies of each resonator in the DM bisected circuit while the CM suppression is accomplished by both harmonic misalignment and careful designed coupled structure in the CM bisected circuit. Eventually, a demonstrated balanced filter centering at 1.5 GHz possesses DM stopband extended up to 8f d 0 , where f d 0 denotes the DM operation frequency, and its CM rejection ratio (CMRR) within DM passband better than 51.9 dB is attained. For measurement convenience, the DM characterizations have been accomplished by 2-port network analyzer with simple rat-race baluns and are found relatively accurate within the −15 dB bandwidth of the utilized baluns.

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Section: Design Concept Of Balanced Bpfmentioning

confidence: 99%

Stopband-Extended Balanced Filters Using Both Λ/4 and Λ/2 Sirs With Common-Mode Suppression and Improved Passband Selectivity

Lin¹,

Yeh²

2012

PIER

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“…However, this method not only increased the device volume but also required additional matching circuits and feed structure. The third method is based on multi-layered structure, which reduces the circuit size effectively, while suffers from the design complexity and causes a complex integration in packaging [15]. The last method is based on single quad-mode resonator [16].…”

Section: Introductionmentioning

confidence: 99%

Compact Step-Impedance Ring Resonator for Quad-Band Band-Pass Filter

Feng

Huang²,

Wang³

et al. 2013

PIER Letters

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Abstract-A compact quad-band microstrip band-pass filter (BPF) based on novel step-impedance ring resonator (SIRR) is investigated in this paper. The proposed BPF is composed of one ring resonator and input/output coupled structure. The novel resonator is studied and employed to generate four desired independent passbands. A compact quad-band BPF centered at 1.57, 2.45, 3.5 and 5.2 GHz is designed and fabricated. The predicted results are compared with measured data, and good agreement is reported.

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“…Quad-band bandpass filters have thrived in recent years [6][7][8][9][10][11][12][13]. In [6], a quad-band BPF is achieved based on splitting two passbands of a dual-band BPF by transmission zeros (TZs).…”

Section: Introductionmentioning

confidence: 99%

“…This method is not applicable when there is a great distance between pass bands. In [7,8], quad-band BPFs are proposed using multi-layered structures composed of microstrip and defected ground structure resonators. Two sets of dual-mode resonators are applied to realize a quad-band BPF in [9].…”

Section: Introductionmentioning

confidence: 99%

Compact Planar Quad-Band Bandpass Filter for Application in Gps, Wlan, Wimax and 5g Wifi

Honarvar¹

2016

PIER Letters

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Abstract-In this paper, a novel compact second-order quad-band bandpass filter (BPF) is applied based on a novel quintuple-mode stub-loaded trigonal ring resonator. Resonant characteristics are extracted by even-and odd-mode method. Designing procedure of resonant frequencies has also been presented. The last two resonant modes are utilized to cover a wide bandwidth for 5G WiFi application. The rest of other three resonant modes are used to form three passbands for GPS, WLAN and WiMAX applications. According to pseudo-interdigital structure four transmission zeros are generated among passbands to improve the band to band rejection and enhance the frequency selectivity. The measurement results agree well with the EM simulation ones.

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Design and Fabrication of a Quad-Band Bandpass Filter Using Multi-Layered Sir Structure

Cited by 14 publications

References 15 publications

Stopband-Extended Balanced Filters Using Both Λ/4 and Λ/2 Sirs With Common-Mode Suppression and Improved Passband Selectivity

Stopband-Extended Balanced Filters Using Both Λ/4 and Λ/2 Sirs With Common-Mode Suppression and Improved Passband Selectivity

Compact Step-Impedance Ring Resonator for Quad-Band Band-Pass Filter

Compact Planar Quad-Band Bandpass Filter for Application in Gps, Wlan, Wimax and 5g Wifi

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